package com.nowcoder.community.controller;

import com.google.code.kaptcha.Producer;
import com.nowcoder.community.entity.User;
import com.nowcoder.community.service.UserService;
import com.nowcoder.community.util.CommunityConstant;
import com.nowcoder.community.util.CommunityUtil;
import com.nowcoder.community.util.MailClient;
import com.nowcoder.community.util.RedisKeyUtil;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.*;
import org.thymeleaf.TemplateEngine;
import org.thymeleaf.context.Context;

import javax.imageio.ImageIO;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Map;
import java.util.concurrent.TimeUnit;

@Controller
public class LoginController implements CommunityConstant {
    private static final Logger logger= LoggerFactory.getLogger(LoginController.class);
        @Autowired
        private UserService userService;
        @Autowired
        private Producer kaptchaProducer;
        @Value("${server.servlet.context-path}")
        private String contextPath;
        @Autowired
        private RedisTemplate redisTemplate;
        @Autowired
        private MailClient mailClient;
        @Autowired
        private TemplateEngine templateEngine;

        @RequestMapping(path = "/register",method = RequestMethod.GET)
        public String getRegisterPage(){
        return "/site/register";
    }
        @RequestMapping(path = "/login",method = RequestMethod.GET)
        public String getLoginPage(){
            return "/site/login";

        }

        @RequestMapping(path = "/register",method = RequestMethod.POST)
        public String register(Model model, User user){
            Map<String,Object>map=userService.register(user);
            if (map==null||map.isEmpty())
            {
              model.addAttribute("msg","注册成功，我们已经向您的邮箱发送了一封激活邮件，请尽快激活");
              model.addAttribute("target","/index");
              return "/site/operate-result";


            }else {
                model.addAttribute("usernameMsg",map.get("usernameMsg"));
                model.addAttribute("passwordMsg",map.get("passwordMsg"));
                model.addAttribute("emailMsg",map.get("emailMsg"));
                return "/site/register";
            }

        }
        @RequestMapping(path = "/activation/{userId}/{code}",method = RequestMethod.GET)
        public String activation(Model model,@PathVariable("userId") int userId, @PathVariable("code") String code){
            int result = userService.activation(userId, code);
            if(result==ACTIVATION_SUCCESS){
                model.addAttribute("msg","激活成功，您的账号已经可以正常使用了!");
                model.addAttribute("target","/login");
            }else if (result==ACTIVATION_REPEAT){
                model.addAttribute("msg","无效的操作，该账号已经激活过!");
                model.addAttribute("target","/index");
            }else{
                model.addAttribute("msg","激活失败，您提供的激活码不正确!");
                model.addAttribute("target","/index");
            }
           return "/site/operate-result";
        }
      @RequestMapping(path = "/kaptcha",method=RequestMethod.GET)
      public void getKaptcha (HttpServletResponse response/*, HttpSession session*/){
            //生成验证码
          String text = kaptchaProducer.createText();
          BufferedImage image = kaptchaProducer.createImage(text);

          //将验证码存入session
          //session.setAttribute("kaptcha",text);
          //验证码的归属
          String kaptchaOwner = CommunityUtil.generateUUID();
          Cookie cookie =new Cookie("kaptchaOwner",kaptchaOwner);
          cookie.setMaxAge(60);
          cookie.setPath(contextPath);
          response.addCookie(cookie);
          //将验证码存入redis
          String redisKey = RedisKeyUtil.getKaptchaKey(kaptchaOwner);
          redisTemplate.opsForValue().set(redisKey,text,60, TimeUnit.SECONDS);

          //将图片输出给浏览器
          response.setContentType("image/png");
          try {
             OutputStream os = response.getOutputStream();
             ImageIO.write(image,"png",os);
          } catch (IOException e) {
              logger.error("响应验证码失败"+e.getMessage());
          }
      }
     @RequestMapping(path = "/login",method = RequestMethod.POST)
     public String login(String username,String password,String code,boolean remebermer,Model model/*,HttpSession session*/,HttpServletResponse response,@CookieValue("kaptchaOwner") String kaptchaOwner) {
         //检查验证码
         //String kaptcha = (String) session.getAttribute("kaptcha");
         String kaptcha=null;
         if(StringUtils.isNotBlank(kaptchaOwner)){
             String redisKey=RedisKeyUtil.getKaptchaKey(kaptchaOwner);
             kaptcha=(String)redisTemplate.opsForValue().get(redisKey);
         }
         if (StringUtils.isBlank(kaptcha) || StringUtils.isBlank(code) || !kaptcha.equalsIgnoreCase(code)) {
             model.addAttribute("codeMsg", "验证码不正确！");
             return "/site/login";
         }
             //检查密码账号
         int expiredSeconds = remebermer ? REMEBER_EXPIRED_SECONDS : DEFAULT_EXPIRED_SECONDS;
         Map<String, Object> map = userService.login(username, password, expiredSeconds);
         if (map.containsKey("ticket")) {
                 Cookie cookie = new Cookie("ticket",map.get("ticket").toString());
                 cookie.setPath(contextPath);
                 cookie.setMaxAge(expiredSeconds);
                 response.addCookie(cookie);

                 return "redirect:/index";
         } else {
                 model.addAttribute("usernameMsg",map.get("usernameMsg"));
                 model.addAttribute("passwordMsg",map.get("passwordMsg")) ;
                 return "/site/login";

         }
        }
        @RequestMapping(path = "/logout",method = RequestMethod.GET)
        public String logout(@CookieValue("ticket")String ticket){
            userService.logout(ticket);
            SecurityContextHolder.clearContext();
            return "redirect:/login";

        }
    // 忘记密码页面
    @RequestMapping(path = "/forget", method = RequestMethod.GET)
    public String getForgetPage() {
        return "/site/forget";
    }

    // 获取验证码
    @RequestMapping(path = "/forget/code", method = RequestMethod.GET)
    @ResponseBody
    public String getForgetCode(String email, HttpSession session) {
        if (StringUtils.isBlank(email)) {
            return CommunityUtil.getJSONString(1, "邮箱不能为空！");
        }

        // 发送邮件
        Context context = new Context();
        context.setVariable("email", email);
        String code = CommunityUtil.generateUUID().substring(0, 4);
        context.setVariable("verifyCode", code);
        String content = templateEngine.process("/mail/forget", context);
        mailClient.sendMail(email, "找回密码", content);

        // 保存验证码
        session.setAttribute("verifyCode", code);

        return CommunityUtil.getJSONString(0);
    }

    // 重置密码
    @RequestMapping(path = "/forget/password", method = RequestMethod.POST)
    public String resetPassword(String email, String verifyCode, String password, Model model, HttpSession session) {
        String code = (String) session.getAttribute("verifyCode");
        if (StringUtils.isBlank(verifyCode) || StringUtils.isBlank(code) || !code.equalsIgnoreCase(verifyCode)) {
            model.addAttribute("codeMsg", "验证码错误!");
            return "/site/forget";
        }

        Map<String, Object> map = userService.resetPassword(email, password);
        if (map.containsKey("user")) {
            return "redirect:/login";
        } else {
            model.addAttribute("emailMsg", map.get("emailMsg"));
            model.addAttribute("passwordMsg", map.get("passwordMsg"));
            return "/site/forget";
        }
    }

}

